Top scientist defends data that he says point strongly to life on Mars.

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Principal investigator of the Planetary Fourier Spectrometer instrument on Mars ExpressPlanetary geologist from the California Institute of Technology, Pasadena
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Peplow, M. Formaldehyde claim inflames martian debate. Nature (2005). https://doi.org/10.1038/news050221-15
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DOI: https://doi.org/10.1038/news050221-15